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Gaming Performance Comparison

Recommended System Requirements
Game GeForce 840M 2GB FirePro M3900
Cyberpunk 2077 559% 2096%
Assassins Creed: Valhalla 508% 1926%
Genshin Impact 565% 2116%
FIFA 21 235% 1018%
eFootball PES 2021 235% 1018%
Watch Dogs Legion 541% 2037%
Call of Duty: Black Ops Cold War 576% 2155%
Marvel's Avengers 529% 1998%
Microsoft Flight Simulator 488% 1861%
Mafia: Definitive Edition 853% 3076%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 840M 2GB are massively better than the AMD FirePro M3900.

The GeForce 840M 2GB was released over a year more recently than the FirePro M3900, and so the GeForce 840M 2GB is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the FirePro M3900.

The GeForce 840M 2GB has 1024 MB more video memory than the FirePro M3900, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GeForce 840M 2GB also has superior memory performance overall.

The GeForce 840M 2GB has 1.6 GB/sec greater memory bandwidth than the FirePro M3900, which means that the memory performance of the GeForce 840M 2GB is marginally better than the FirePro M3900.

The GeForce 840M 2GB has 384 Shader Processing Units and the FirePro M3900 has 160. However, the actual shader performance of the GeForce 840M 2GB is 583 and the actual shader performance of the FirePro M3900 is 71. The GeForce 840M 2GB having 512 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce 840M 2GB delivers a noticeably smoother and more efficient experience when processing graphical data than the FirePro M3900.

The GeForce 840M 2GB requires 33 Watts to run and the FirePro M3900 requires 20 Watts. The GeForce 840M 2GB requires 13 Watts more than the FirePro M3900 to run. The difference is not significant enough for the GeForce 840M 2GB to have a noticeably larger impact on your yearly electricity bills than the FirePro M3900.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1029 MHzvs680 MHz
Boost Clock1124 MHzvs-
ArchitectureMaxwell GM108Caicos
OC Potential Poor vs -
Driver Support Great vs -
Release Date12 Mar 2014vs13 Apr 2011
GPU LinkGD LinkGD Link

Resolution Performance

green tick vs -
green tick vs -
green tick vs -
green tick vs -
green tick vs -

GPU Memory

Memory2048 MBvsN/A
Memory Speed1001 MHzvs900 MHz
Memory Bus64 Bitvs64 Bit
Memory TypeDDR3vsDDR3
Memory Bandwidth16GB/secvs14.4GB/sec
L2 Cache 1024 KB green tick vs -
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units384vs160
Actual Shader Performance28%vs3%
Texture Mapping Units24vs-
Texture Rate24.7 GTexel/svs-
Render Output Units8vs-
Pixel Rate8.2 GPixel/svs-

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs-
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections0vs0
DisplayPort Connections-vs-

GPU Power Requirements

Max Power33 Wattsvs20 Watts
Recommended PSU--

GPU Features

Shader Model5.0vs5.0
Open GL4.5vs4.0
Open CL-vs-
Notebook GPUyesyes

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-4100M 2.5GHz-
Recommended RAM4 GB-
Maximum Recommended Gaming Resolution1366x768-

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce 840M 2GB is a Middle-Class Mobile Graphics Card based on the First Revision of the Maxwell architecture.

The Maxwell architecture features many improvements and among them is the extremely large L2 Cache which allows NVIDIA to produce Graphics Cards with relatively small memory data transfer rates, without causing too much impact on the overall performance. Furthermore, the Shaders have been redesigned and are both more powerful and energy efficient.

It equips a GPU codenamed GM108 which has 3 SM activated and thus offers 384 Shader Processing Units, 24 TMUs and 8 ROPs. The central unit runs at 1029MHz and goes up to 1124MHz, in Turbo Mode.

The GPU accesses a 2GB frame buffer of DDR3, through a 64-bit memory interface. The Frame Buffer is exaggerated and in no way benefits the GPU. The memory clock operates at 1001MHz.

DirectX 11.2 Support (11.0 Hardware Default) and support for GPU Boost 2.0, GeForce Experience, PhysX and other technologies.

Power Consumption
With a rated board TDP of 33W, it will only be equipped in average sized notebooks.

Benchmarks indicate its performance is over 20% faster than the older GeForce GT 740M. Therefore, it should match GeForce GT 750M.

System Suggestions
We recommend a modest processor (Intel Core i5 Mobile) and 4GB of RAM for a notebook with GeForce 840M 2GB.
Professionals in the CAD (Computer Aided Design) and DCC (Digital Content Creation) industries need to be agile while being highly productive both in their office and on-the-go. AMD works with notebook vendors to provide workstation solutions to deliver advanced performance for applications across all industry segments. AMD FirePro™ professional graphics are compliant with the latest industry standards. Plus, AMD Catalyst™ professional graphics drivers are especially tuned to enable outstanding performance for many major CAD and DCC applications.
Recommended CPU
Possible GPU Upgrades
GPU Variants